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Unit2CrossingLimitsWordsandExpression•evaluate•various•key•origin•equip•endeavour•puzzle•wealthy•Asian•westernmost•African•ambassador•wander•motherland•awareness•existence•accurate•navy•treasure•fleet•command•royal•embassy•zebra•symbolic•volunteer•sum•dam•horizon•navigation•inthenameof•inexchangefor•setsail(to/from/for…)•inreturn•bringupParagraph1•形成人们努力（探索世界）的基础•激起探索者寻找的热情•formthefoundationformankind’sgreatestendeavour•inspireexplorerstosearchforsp.Paragraph2•众所周知•与……交换•Itiswellknownthat…•inexchangeforParagraph3•发展成为世界贸易中心•developintotheworld’stradingcentreParagraph4•促进，导致•被抓•leadto•betakenprisonerParagraph5•拓展，伸出•文化遗迹•追溯到•reachout•culturalrelics•datefromParagraph6•意识到彼此的存在•正式往来的时机成熟了。•到达了繁盛时期•中国的新朝代开始繁荣了。•theawarenessofeachother’sexistence•Thetimewasripeforagrandmeeting.•reachtheheightofpower•Chinaprosperedunderanewdynasty.Paragraph7•下西洋从事探险•在……的邻导之下•起航•sailwestwardsonvoyagesofexploration•underthecommandof…•setsail(to/from/for)Paragraph8•重新确立关系•送某人贵重礼物•送信•设立使馆•作为回报•货物交流的象征意义比货物本身的价值要重要的多。•renewrelations•sendsb.aroyalpresent•sendamessagetosb.•openembassies•inreturn•Theexchangeforgoodshadasymbolicmeaningfarmoreimportantthanthevalueofthegoodsthemselves.•她的决定对他来说是个谜。•令我百思不解的是他们为什么没有出现。•她教他英语，他教她汉语。•他在街上游荡。Herdecisionwasapuzzletohim.Whatpuzzlesmeiswhytheydidn'tshowup.SheisgivinghimEnglishlessonsinexchangeforhisteachingherChinese.Hewanderedinthestreets.1.形成人们努力（探索世界）的基础2.激起探索者寻找的热情3.与……交换4.被抓5.拓展，伸出6.追溯到7.下西洋从事探险8.在……的邻导之下9.起航10.作为回报GrammarpredicateGoingHigh:ThePioneersoftheThirdPole•suggest•accomplish•sickness•unable•scared•honesty•dedication•technological•aircraft•evidence•chairman•praise•apartfrom•referto•runout•suggestv.•accomplishv.•sicknessn.•scaredadj.•honestyn.•dedicationn.•technologicaladj.•n.suggestion•v.accomplishment•adj.sick•v.scare•adj.honest•v.dedicate•n.technologyParagraph1•发现最远的角落•在地图上定位大洲和大洋•到达南北极•发现世界上主要河流的源头•explorethefarthestcorners•mapthecontinentsandtheoceans•reachtheNorthandSouthPoles•discovertheoriginsoftheworld’smajorriversParagraph2•除……之外•稀薄的空气•引发高原反应•适应极端的环境•apartfrom•thinair•causemountainsickness•adjusttotheseextremeconditionsParagraph3•充当向导•诚实和奉献精神•使他们成为理想的伴侣•依靠•actasguides•honestyanddedication•makethemidealcompanions•relyonParagraph4•面对•嘲笑•认为•用尽•作出技术的进步•达到预定目标•beupagainst•laughat•refertoas•runout•maketechnologicaladvancesin…•makeitParagraph5•成功作某事•尝试从不同的山坡登山•succeedindoing•attempttoclimbthemountainoverdifferentslopesParagraph6•照相•留下•毛主席头像•返回•被誉为民族英雄•takephotos•leavebehind•aportraitofChairmanMaoZedong•onone’sreturn•bepraisedasnationalheroesParagraph7•基于•baseon•他们成功地完成了任务。•出版商们对他的小说评价甚高。•Theyhaveaccomplishedtheirmissionsuccessfully.•Thepublisherspraisedhisnovelprettyhighly.